The Method to Replace the Front Wheel Bearing (3)

Now turn the whole hub over and clean the mating surface for the outer wheel bearing race. Center the new race in the hub and carefully check that it is straight. Like the inner bearing race, you’ll want to use either a drift or a socket to tap the outer race into the hub. Be careful not to cock the race in the bore when driving it in. Keep driving the race down until it hits the stop on the flange. Take care not to damage the tapered face of the race. 

 

Now turn the whole hub over and clean the
mating surface for the outer wheel bearing race. Center the new race in the hub
and carefully check that it is straight. Like the inner bearing race, you’ll
want to use either a drift or a socket to tap the outer race into the hub. Be
careful not to cock the race in the bore when driving it in. Keep driving the
race down until it hits the stop on the flange. Take care not to damage the
tapered face of the race. 

 

Coat the spindle with a good amount of high
temp wheel bearing grease. In this case, we are using the factory applied
grease from Mercedes-Benz.  Now fit the wheel hub back over the spindle
and push it back until the seal pops over the flange on the back of the
spindle. Pack the front wheel bearing with the high temp grease like you did
with the rear bearing. Like before, take your time and make sure that all the
spaces in the bearing are coated evenly. Fit the bearing into the wheel hub.
Keep in mind that the tapered section of the bearing fits into the race facing
inward.

 

You’ll now need to adjust the wheel
bearing. There are two schools of thought of how to do this. One is to use a
dial indicator mounted on the face of the wheel hub and measure the amount of
lateral run out on the center of the clamping nut. The other is to thread the
nut on the end of the spindle and tighten it until you can’t turn the hub anymore.
Then back the nut off until you can just turn the hub by hand. Then tighten the
5mm bolt on the end of
the nut to 11Nm (8ft/lbs).

 

If you use a dial indicator, set up the
indicator to measure the lateral play (back and forth pulling on the rotor) while
turning it. You£l need to
tighten the spindle nut when the run-out measures between 0.01-0.02mm. 

 

Like with the other method, tighten the 5mm bolt on the end of the nut to 11Nm (8ft/lbs). The last step is to put a
little of the high temp grease on the inside of the dust cap and place it back
onto the hub. Use a hammer to lightly tap the hub back into place. All that’s
left to do at this point is to re-install the brake disc, pads and calipers and
you’re done.

 

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